Comparison of the ζ-potential measuring methods accuracy for the colloidal particles

Abstract

The study is devoted to the choice of an optimal method for determining the ζ-potential of colloidal SiO2 particles. The electrokinetic potential was measured using two methods: (i) acoustic and electro-acoustic spectroscopy; (ii) horizontal agarose gel electrophoresis. Based on experimental and calculated data, an optimal method for measuring the ζ-potential of colloidal SiO2 particles was chosen.

Keywords

• ζ-potential
• electro-acoustic spectroscopy
• electrophoresis
• absolute error
• relative and normalized error
• distribution of the mean square deviation